用共线点列标定摄像机镜头畸变

Camera lens distortion calibration with co-line points

提出一种用共线点列标定摄像机镜头畸变参数的方法,先根据交叉比不变性确定畸变中心,再利用直线的中心投影仍为直线这一性质确定畸变系数。仿真表明,只要采用相应方法降低像点坐标的误差,畸变中心的误差小于2个像素,畸变系数的相对误差不超过0.1。实验表明,用该方法得到的畸变参数,能够很好地校正图像。该方法简单易行,可应用于摄影测量、计算机视觉等领域。

A camera calibration method with co-line points is proposed, in which distortion center is located according to cross ratio invariability, and then distortion coefficients are calculated based on a line＇s central projection is a line. The emulation indicates that only ff some measures are adopted to decrease the projection points＇coordinate error,error of the distortion center would be less than 2 pixels and relative error of the distortion coefficients would be no more than 0.1. The experiment shows that these distortion parameters gained with the proposed method are good at a correcting distortion image. Because of its easiness and simplicity,this method can be used in some domains such as photogrammetry,computer vision, etc.